package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    /**
     * 根据id进行删除，删除之前进行判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        //添加查询条件，跟据分类id进行查询菜品数据，查询id是否为唯一
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish :: getCategoryId,id);
        int count1 = dishService.count();
        //查询当前分类是否关联菜品，如果关联抛出一个业务异常
        if (count1 > 0) {
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        //查询当前分类是否为关联套餐，如果关联抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal :: getCategoryId,id);
        int count2 = setmealService.count();
        if (count2 > 0) {
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
        //都未关联，直接进行删除
        super.removeById(id);
    }
}
